website
Sold out
  • Genuine OEM & Performance Brands

    All parts backed by full factory or manufacturer limited warranty for peace of mind.

  • We’re Racers. It’s Our Passion.

    We live and breathe performance — we know what works and what doesn’t.

  • Personal Support & Fitment Help

    We’ll help you find the right part the first time — one-on-one service every step of the way.

  • Nationwide Delivery — Local Pickup Available

    Quick turnaround on in-stock items and free local delivery in the Joplin area.

Trailmaster SX125 Dirt Bike – 124cc 4-Speed Manual

No review
Trailmaster
Out of stock
Pro Series Dirt Bike
$1,799.00
Elevate your off-road experience with the all-new Trailmaster SX125 Dirt Bike, the perfect lightweight starter bike for adults and taller youth riders ready to...

customers are viewing this product
Trailmaster SX125 Dirt Bike – 124cc 4-Speed Manual

Elevate your off-road experience with the all-new Trailmaster SX125 Dirt Bike, the perfect lightweight starter bike for adults and taller youth riders ready to hit the trails or track with serious performance.
Available now at Lee Motorsports, conveniently located between Joplin and Seneca, Missouri — fast delivery available!


🔥 Key Features of the Trailmaster SX125:

Powerful 124.3cc Air-Cooled 4-Stroke Engine
Built for reliability and responsive power, the SX125's Zongshen engine delivers impressive torque and acceleration while maintaining excellent fuel efficiency.

4-Speed Manual Transmission for Full Control
Shift gears like a pro with a smooth 4-speed manual gearbox, giving you maximum control over every ride.

Lightweight and Agile Performance
With a strong power-to-weight ratio, the SX125 is easy to maneuver, offering the perfect combination of speed, balance, and handling for riders stepping up from pit bikes.

Upgraded Suspension System

  • Extended trailing arm compared to typical pit bikes

  • Inverted front forks for superior impact absorption

  • Nitrogen-filled rear shock for customizable comfort and control

Premium Components Throughout

  • Alloy folding brake and clutch levers

  • Stainless steel performance exhaust

  • Aluminum triple tree for improved steering precision

  • Waterproof wiring harness for durability in any environment

Exceptional Braking and Safety
Oversized, vented brake calipers provide outstanding stopping power, keeping you safe on rough terrain or tight tracks.

Designed for Taller Riders
With a 32.70-inch seat height and 19-inch front tire, the SX125 provides excellent ground clearance, comfort, and control for adult beginners or teens ready for a full-size bike.

Superior Build Quality and After-Sale Support
Trailmaster’s partnership with Zongshen and use of Japanese-style carburetors ensures unmatched engine quality, reliability, and parts support.


🏁 Why Choose the Trailmaster SX125?

  • Serious Value: Competes with Japanese and European bikes at a fraction of the price.

  • Ready for Adventure: Lightweight, durable, and trail-ready from the first ride.

  • Trusted by Riders: Built with high-end materials for a competitive edge in the 125cc class.

  • Flexible Delivery Options: Available assembled for an additional fee through our distributor!


📋 Trailmaster SX125 Dirt Bike - Quick Specs:

  • Engine: 124.3cc 4-Stroke, Air-Cooled, Zongshen Engine

  • Transmission: 4-Speed Manual

  • Start System: Electric Start

  • Frame: Lightweight Alloy Components

  • Front Suspension: Inverted Front Forks

  • Rear Suspension: Nitrogen-Filled Adjustable Shock

  • Brakes: Oversized Vented Disc Brakes

  • Tires: 19" Front Tire

  • Seat Height: 32.70 inches

  • Wiring: Waterproof Harness

  • Exhaust: Stainless Steel Performance Muffler

  • Fuel: Premium Fuel Recommended


⚡ Lightweight, Fast, and Ready to Ride!

👉 Lee Motorsports is your local source for the Trailmaster SX125 Dirt Bike — the perfect bike for riders moving up to true trail or motocross performance.
Secure yours today — delivery available within just a few days!

📍 Visit Lee Motorsports (Joplin/Seneca, MO)
📞 Call us now to reserve your SX125 and start your adventure!

Read More
Read Less
🚚 Lee Motorsports Shipping Information

At Lee Motorsports, we’re committed to providing fast, reliable, and transparent shipping for all our customers. Here’s what you need to know before your order hits the road 👇

🏍️ Product Assembly
Our Lance, SYM, Scootstar, MotoTec, and Trailmaster Powersports vehicles are shipped non-assembled, unless otherwise noted. This helps protect your machine during transit and ensures it arrives safely and damage-free.

⚙️ Performance Parts & Accessories
For most in-stock performance parts and accessories, we ship within 1 business day of your order. That means less waiting — and more riding 🏁

🏢 Warehouse Network
We ship from a nationwide network of warehouses across the lower 48 states. Some products come from our main facility, while others ship from regional warehouses to get your order to you as quickly and efficiently as possible.

🧰 Engines & Transmissions
These items ship via LTL freight directly from our suppliers.
🚛 Lift-gate delivery service is included to bring your order right to your door.
Please allow a few extra days for delivery depending on your location.

📞 Need Help?
If you have questions about your shipment or need special arrangements, our customer service team is always here to help.
Thank you for choosing Lee Motorsports — your trusted source for Performance Parts, Powersports Vehicles & Accessories across the USA
💪 Why Buy From Lee Motorsports — At Lee Motorsports, you’re not just another order number — you’re part of our racing family. 🏁

We’re a small, family-owned business with a passion for performance and a commitment to doing things the right way — with honesty, personal service, and attention to detail that the big corporations simply can’t match.

While the national chains focus on volume, we focus on you — your build, your budget, and your satisfaction. Every message, every call, every order is handled by a real person who cares about getting it right the first time.

When you shop with us, you’re not just buying a product — you’re investing in a relationship built on trust, reliability, and shared enthusiasm for powersports and performance.

From expert guidance before your purchase to full support long after delivery, we’re here to make sure your experience is fast, smooth, and absolutely worry-free.

Because at Lee Motorsports, your satisfaction isn’t a metric — it’s our mission. 🔧❤️

Your cart

×